number_list = ["11","22","33"]
print("0号元素：" + number_list[0])
print("最后一个元素：" + number_list[-2])

number_list.insert(1,"new")
number_list.append("44")
number_list[4] = "66"
del number_list[0]
number_list.remove("44")
number_list.pop(0)
print(number_list)